Bladder structure of a football

ABSTRACT

A football bladder includes an oval body and multiple ribs formed on an outer periphery of the oval body. After a skin is attached to the outer periphery of the oval body, protruding strips are formed on an outer periphery of the skin.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a bladder structure, and moreparticularly to a bladder structure of a football.

2. Description of the Prior Art

In order to have a firm grip to a football, beside the provision of theseam on an outer periphery of the football, protruding ribs are alsoformed on the outer periphery of the football. However, due to frequentfriction with the ground surface, a height of the protruding ribs isgradually reduced, which results in that the football is ended up in thelandfill.

To overcome the shortcomings, the present invention tends to provide animproved bladder structure to mitigate the aforementioned problems.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an improvedbladder having thereon protruding ribs on an outer periphery of thebladder such that after the skins are firmly attached to the bladder,protruding strips are formed on an outer periphery of the football.

Another objective of the present invention is that a void is defined ina mediate portion of the bladder so that after the skins are attached tothe bladder, the seam is able to be formed on the void.

Other objects, advantages and novel features of the invention willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the bladder of the present invention;

FIG. 2 is a plan view of a football constructed in accordance with thepresent invention; and

FIG. 3 is a schematic cross sectional view of a portion of the footballof the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to FIG. 1, it is noted that the bladder in accordancewith the present invention includes an oval body (10) and a plurality ofribs (11) formed on an outer periphery of the body (10).

The ribs (11) on two opposite ends of the body (10) are annular in shapeso that each of the ribs (11) on two ends of the body (10) surrounds theouter periphery of the body (10). A void (12) is defined in a centralmediate portion of the body (10), which terminates the continuity of theribs (11).

With reference to FIG. 2, it is noted that each rib (11) is under theskin of the football so that multiple protruding strips (14) are formedon the football and a seam (not numbered) is formed on the area wherethe void (12) is defined.

With reference to FIG. 3, from the cross sectional view of a portion ofthe football, it is seen that after the skin (13) is attached to theouter periphery of the bladder body, protruding strips (14) are formedand extended upward from an outer periphery of the skin (13). Therefore,the football player is able to have a firm grip to the football by usingthe protruding strips (14). Furthermore, because the protruding strips(14) are formed due to the ribs (11) under the skin (13), frictionbetween the football and the ground surface does not reduce the heightof the ribs (11), but only the skin (13). Therefore, the life span ofthe football lasts a long period of time.

It is to be understood, however, that even though numerouscharacteristics and advantages of the present invention have been setforth in the foregoing description, together with details of thestructure and function of the invention, the disclosure is illustrativeonly, and changes may be made in detail, especially in matters of shape,size, and arrangement of parts within the principles of the invention tothe full extent indicated by the broad general meaning of the terms inwhich the appended claims are expressed.

1. A football bladder comprising: an oval body; and multiple ribs formedon an outer periphery of the oval body, whereby after a skin is attachedto the outer periphery of the oval body to enclose the ribs, multipleprotruding strips are formed on an outer periphery of the skin.
 2. Thefootball bladder as claimed in claim 1, wherein the ribs on two ends ofthe oval body are annular so as to surround the outer periphery of theoval body.
 3. The football bladder as claimed in claim 2, wherein a voidis defined in a central mediate portion of the oval body so that a seamis able to be formed on the void after the skin is attached to the outerperiphery of the oval body.